docstr: Maps from an index of a sample to its filename.
  
  Args:
      dataset:
          Unused, but specified by the overwritten
          function of the parent class.
      index_subset:
          The index of the sample w.r.t. the subset.
  
  Returns:
      The filename of the sample.
docstr_tok: ["Maps","from","an","index","of","a","sample","to","its","filename",".","Args",":","dataset",":","Unused",",","but","specified","by","the","overwritten","function","of","the","parent","class",".","index_subset",":","The","index","of","the","sample","w.r.t",".","the","subset",".","Returns",":","The","filename","of","the","sample","."]
code: def index_to_filename(self, dataset, index_subset: int):
      """Maps from an index of a sample to its filename.
  
      Args:
          dataset:
              Unused, but specified by the overwritten
              function of the parent class.
          index_subset:
              The index of the sample w.r.t. the subset.
  
      Returns:
          The filename of the sample.
      """
      fname = self.filenames_subset[index_subset]
      return fname
  
file_path: lightly/lightly/data/lightly_subset.py
imports: from typing import Dict, List, Tuple
  from lightly.data.dataset import LightlyDataset
label_desc: Use image node_id 5 for calling the LightlySubset obj's underlying member method code with example usage: obj.index_to_filename(dataset, index_subset) and returns: fname